I quit smoking 6 month ago.4 weeks ago I had pneumonia/pleurisy and blood in my spetum. No more blood/cough/fever. I feel short of breath sometimes. Stil?

Not ususual. Many/most people go through a period of shortness of breath when they quit. The reason is, cigarette smoke is very irritating and smokers cough out phlegm with smoking. When you quit, before you heal, there's a period of continued mucous overproduction but you retain the secretions and obstruct your breathing passages. Meds can help. Time will heal. You've done the right thing. Congratulations!